1040142421 has 4 divisors (see below), whose sum is σ = 1047625600. Its totient is φ = 1032659244.

The previous prime is 1040142413. The next prime is 1040142431. The reversal of 1040142421 is 1242410401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1242410401 = 1493 ⋅832157.

It is a cyclic number.

It is not a de Polignac number, because 1040142421 - 2³ = 1040142413 is a prime.

It is a super-4 number, since 4×1040142421⁴ (a number of 37 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040142401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3741381 + ... + 3741658.

It is an arithmetic number, because the mean of its divisors is an integer number (261906400).

Almost surely, 2^1040142421 is an apocalyptic number.

It is an amenable number.

1040142421 is a deficient number, since it is larger than the sum of its proper divisors (7483179).

1040142421 is an equidigital number, since it uses as much as digits as its factorization.

1040142421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7483178.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1040142421 is about 32251.2390614686. The cubic root of 1040142421 is about 1013.2056501629.

Adding to 1040142421 its reverse (1242410401), we get a palindrome (2282552822).

The spelling of 1040142421 in words is "one billion, forty million, one hundred forty-two thousand, four hundred twenty-one".